A dentist has gone viral on TikTok after posting a video explaining three times you should never brush your teeth. Brushing your teeth is something that has likely been a part of your everyday life since you were a child, but with different advice given out by various sources, whether they’re from our own dentist, your parents or online health experts, it can be tricky to keep track of how best to keep our gnashers in tip-top condition. Three times you should not brush your teethDr Shaadi Manouchehri is a qualified dentist who posts helpful tips on how to care for your teeth via her social med…